<template>
    <el-container class="home-container">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!-- 页面主题区域 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ?'64px' : '200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!-- 侧边栏菜单区 -->
               <el-menu background-color="#333744" text-color="#fff"
                active-text-color="#409eff" :unique-opened="true" :collapse="isCollapse"
                :collapse-transition="false" :router="true"
                :default-active="activePath">
                <!-- 一级菜单 -->
                <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
                    <!-- 一级菜单的模板区 -->
                    <template slot="title">
                        <!-- 图标 -->
                        <i :class="iconsObj[item.id]"></i>
                        <!-- 文本 -->
                        <span>{{item.authName}}</span>
                    </template>
                    <!-- 二级菜单 -->
                    <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
                    @click="saveNavState('/'+subItem.path)">
                        <template slot="title">
                        <!-- 图标 -->
                        <i class="el-icon-menu"></i>
                        <!-- 文本 -->
                        <span>{{subItem.authName}}</span>
                    </template>
                    </el-menu-item>
                </el-submenu>
                </el-menu> 
            </el-aside>
            <!-- 主体区域 -->
            <el-main>
                <!-- 路由占位符 -->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
    data(){
        return{
            // 左侧菜单数据
            menulist:[],
            iconsObj:{
                '125':'iconfont icon-user',
                '103':'iconfont icon-tijikongjian',
                '101':'iconfont icon-shangpin',
                '102':'iconfont icon-danju',
                '145':'iconfont icon-baobiao'
            },
            // 是否折叠
            isCollapse:false,
            // 被激活的链接地址
            activePath:''
        }
    },
    created(){
        this.getMenList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods:{
        logout(){
            window/sessionStorage.clear();
            this.$router.push("/login");
        },
        // 获取所有的菜单
        async getMenList(){
           const {data:res} = await this.$http.get('menus')
           if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
           this.menulist = res.data
           console.log(res);
        },
        // 点击按钮切换菜单的折叠与展开
        toggleCollapse(){
            this.isCollapse = !this.isCollapse
        },
        // 保存连接的激活状态
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath = activePath
        }
    }
}
</script>

<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header{
    background-color: #373D41;
    display:flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div{
        display:flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }
}
.el-aside{
    background-color: #333744;
    .el-menu{
        border-right: none;
    }
}
.el-main{
    background-color: #EAEDF1;
}

.iconfont{
    margin-right: 10px;
}

.toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>
